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@cypher. It is impossible for 行ったらいいのに to refer to self, and for 行けたらいいのに to refer to others?
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FlawMar 17 '12 at 3:19

@Flaw I'm not sure, but I think they generally mean the above. Looking at the うちの娘が...行けたらいいのに example here, I think it may be possible for 行けたらいいのに to refer to others if there's an explicit subject.
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cypherMar 19 '12 at 4:18

@cypher. Perhaps the one with potential i.e. 行けたらいいのに would have a higher tendency to refer to self because it is easier for one to assess one's own potential than another person's.
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FlawMar 19 '12 at 4:37